function clickme(){
		var xmlhttp;
		var txt,x,xx,i;
		if (window.XMLHttpRequest)
		  {// code for IE7+, Firefox, Chrome, Opera, Safari
		  xmlhttp=new XMLHttpRequest();
		  }
		else
		  {// code for IE6, IE5
		  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
		  }
		xmlhttp.onreadystatechange=function()
		  {
			x=xmlhttp.responseXML.documentElement.getElementsByTagName("book");
			if (x.length > 0){
			txt="<table border='1'>";
			txt = txt + "<tr> <td>Title</td>";
			txt = txt + "<td>Author</td>";
			txt = txt + "<td>Publisher </td>";
			txt = txt + "<td>Description </td>";
			txt = txt + "<td>ID</td>";
			txt = txt + "</tr>";
			 
			 for (i=0;i<x.length;i++)
		      {
		      	txt=txt + "<tr>";
		      	xx=x[i].getElementsByTagName("title");
		      	txt=txt + "<td>" + xx[0].firstChild.nodeValue + "</td>";
		      	
		      	xx=x[i].getElementsByTagName("author");
		      	txt=txt + "<td>" + xx[0].firstChild.nodeValue + "</td>";
		      	
		      	xx=x[i].getElementsByTagName("publisher");
		      	txt=txt + "<td>" + xx[0].firstChild.nodeValue + "</td>";
		      	
		      	xx=x[i].getElementsByTagName("description");
		      	txt=txt + "<td>" + xx[0].firstChild.nodeValue + "</td>";
		      	
		      	xx=x[i].getElementsByTagName("ID");
		      	txt=txt + "<td>" + xx[0].firstChild.nodeValue + "</td>";
		      	
		      	txt = txt + "</tr>";
		      }
			 txt=txt + "</table>";}
			else 
				txt = "Không có sách nào như vậy trong thư viện";
			 document.getElementById('result').innerHTML=txt;
		  };
		var title = document.getElementById("title").value;
		var publisher = document.getElementById("publisher").value;
		var author = document.getElementById("author").value;
		var query = "?title="+encodeURIComponent(title)+"&publisher="+encodeURIComponent(publisher)+"&author="+encodeURIComponent(author);
		xmlhttp.open("GET","/librarysystem/SearchBook"+query,true);
		xmlhttp.send();		
	}